Lamp



FIG. 1 is a perspective view of a lamp showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof, the left side view being a mirror image;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear view thereof.

The broken lines represent environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a lamp, as shown and described. 